Hoister-drum with hollow shafts.



' N0- 843,l54=. PATEN'IED FEB. 5, 1907.

A. LAMBERT.

HOISTER DRUM WITH HOLLOW SHAFT.

APPLICATION FILED OCT; 2, 1906.

2 SHEETS-SHEET 1.

N0. 843,154. PATENTED FEB. 5, 1907. A. LAMBERT.

HOISTER DRUM WITH HOLLOW SHAFT.

A PPLIOATION FILED OCT. 2. 1906.

2 SHEETS-SHEET 2.

- UNITED STATES PATENT OFFICE- HOISTER-DRUM WITH HOLLOW sHAF'rsr L inc. 843,154.

Specification of Letters Patent.

Patented Feb. 5, 1907.

' Application filed ctolier2.1906- 8eria1No.837,066-

3T0 all whom it may concern:

Be it known that I, ASHER. LAMBERT, a citizen of the United States, residing at 1 Johnson avenue, Newark, county of Essex,

5 and State of New Jersey, have invented certam new and useful Improvements in Holster-Drums with Hollow Shafts, fully described and represented in the following specification and the accompanying drawings, forming a part of the same.

Theobject of this invention is to improve the construction and the operation of the drums and shafts used in hoist' -engines, and especially that class in which t e drum- 1 5 shaft is held stationary and the drum and the gears for operating the same are constructed to turn loosely thereon.

In the present invention I make the shaft hollow and am thus enabled to screw within its ends the nuts which are employed for the thrustscrews in operating the drum-clutch. I thus avoid the addition of clums additions to the shaft-bearings, such as ave been -heretofore employed to sustain the thrust- 5 screws, and I wholly avoid the end thrust upon the bearings by 00 g it all to the interior of the shaft. The cross-keys, which are used in such cases to press the drum and friction-driver together, is extend- 3 ed across the hollow interior of the shaft, and

the thrust-"screw may be formed with an integral extension which projects within the shaft to contact with the cross-key.

In the annexed drawings I have shown a drum with a direct-driving gear adjacent to 7 "one end and a reversing-gear adjacent tothe opposite end, thesaid gears being turned in opposite directions by suitable connections with the motor-shaft and the adjacent faces 4 of the drum, and such gears being provided with com lementary friction-clutch surfaces,

so that w en the drum is.pressed in one di- 7 rection it engages the direct-driving gear and is rotated bac ardly and when pressed in the opposite direction it enga es the reversing-gear and is turned forwar y. The drum l is eld stationaryfrom contactwith either of the friction-surfaces by a s ringnpr sprin s I ap lied to the shaft within t e m, whidh 5 ho ,ds it in a central position. Such a drum requires two thrust-screws operating upon cross-keys at its opposite ends to press the drum inopposite directions, as desired, and I furnish a means of operatin such thrustscrews from a single crank or and wheel by extending a gear-shaft across the hoisterframe at one side of the drum and coupling the ends of the shaft by suitable gearing to the two thrust-screws, so that when the gearing is rotated or either of the thrust-screws is rotated it operates to turn both simultaneously, but screwing in 0 posite directions so that either one is move out of action w on the other is moved into action.

The advantages of using the stationary hollow shaft with a stationary nut in its end for the thrust-screw are obviously secured with the use of a drum and a single frictiondriver of any kind rotated upon the shaft continuously in one direction.

The construction will be understood by reference to the annexed drawings, in which- Figure 1 is a plan my invention; and Fig. 2 is a vertical elevation where hatched at 'the center of the reversing-drum.

The frame A of the hoister is shown with bearings B for a hauling-drum C and bearings D for a reversing-drum El The shaft of the reversing-drum is shown hollow and formed with circular grooves on its ends,

cent to the hollow cone H and is provided same when pressed thereto. A reversinggear J is fittedto turn upon the shaft near the opposite end of the drum and is provided with afriction-cone J to engage the hollow cone H when ressed thereto. The gearsI and J are held it shaft by collars K, which are secured thereon between such gears and is obvious that their hubs ma contact with the bearings, w factually resist end movement, held in the bearings.

Collars L are secured adjustabl u on the shaft by screws L between the hu s of the drum, and springs M are fitted loosely around theshaft between the said collars and hubs and are adjusted to hold the friction-surfaces upon the drum intermediate to and clear from the friction-surfaces upon the gears I "and J, as is indicated in Fig. 2.

be fitted into 'ch would efas the shaft is of a hoister, illustrating with a friction-cone I, adapted to engagethe the bearings; but it which are locked in the bearings D and enom end movement upon the A nut N is shown with an external thread screwed into each end of the hollow shaft and with an intermediate thread fitting a thrustscrew 0.

A cross-key a is shown extended through a slot 0, in the shaft just outside each hub of the drum, pressing upon a notched collar 6,

-' which contacts with the drum, and thrustpins 6 are shown integral with the thrustscrews 0 and extended nearly into contact with the cross-keys, so that the advance of either one of the thrust-screws would speedily press the adjacent cross-key toward the drum and force the drum against the opposite friction-surfaces Ior J. A gear-shaft P is extended at one side of the drum Ethrough bearings Q upon the frame A, and the oppo-' site ends of the shaft are coupled to the thrust-screws O by gears R upon the shaft and screws, which gears are connected by chains R. A hand-wheel S is shown upon one of the screws to turn the gearing, and the connection between the shaft and the two thrust-screws thus turns them both simultaneously. The rotation of the screws produces an advance of one toward the adjacent cross-key a and the retraction of the other thrust-screw from its corresponding cross key, thus shifting the drum from its neutral or'intermediate position into contact with one of the friction-surfaces I or J.

The gears I and J are rotated continuously in opposite directions by any usual connections to a motor-shaft T, and the turning of the hand-wheel S thus operates to shift the drum in opposition to one or the other of the springs M into contact with either of the gear-wheels, so as to rotate'thedrum in either direction desired.

When the thrust-screws .are set 'by the hand-wheel in their intermediate position, as represented in Fig. 2, they produce no pressure u on the cross-keys, and the springs M hold tl ie friction-surfaces upon the drum en tirely clear from those upon the gears, thus avoiding wear.

The hollow shaft may also serve to hold a considerable reserve of oil for lubricating the hub of any revolving part.

In Fig. 2' an oil-cup d is shown upon the middle of the shaft, and the space inside the same extending to the ends of the hubs G is inclosed by plugs e, fitted tightly in the bore. Oil-holes f are shown in the shaft leading to the interior of each hub G, and any unusual supply of oil introduced into the space between the plugs or any oil supplied from the oil-cup 61 serves as continuous lubrication for the hubs. The plugs e prevent the escape of the oil from the slots 0/, which are adjacent to the ends of the drum. Other applications of the hollow shaftfor oiling the hubs may obviously be made. The use of the ho]- low shaft F not only affords a means of lubrieating the hubs of the drum, but also obviates the necessity of boring into the ends of asolid shaft for the reception of thrust-pins,

' and by its admission of the thrust-screws and their nuts into the ends of the shaft it avoids the unslghtly projections which are required when the nuts for the thrust-screws are built .upon the shaft-bearings outside the ends of the shaft. 1

Hollow shafts can be readily obtained in the market and involve no special expense, and the use of such hollow shaft thus not only cheapens the construction, but secures positive advantages in the appearance and operation of the device.

It should be understood that the gear I'is driven by the motor-shaft T in a reverse direction to the gear J, which is effected in the usual manner by a direct connection of the gear J with the crank-shaftthrough a pinion J and an indirect connection of the gear I with the motor-shaft through the gearVupon the hauling-drum C, which meshes with a pinion V upon the motor-shaft.

The several gears rotate continuously in the same direction unless the motor-shaft be reversed.

I do not claim herein this method of arranging the gearings, as I have claimed the same in my copending application, Serial No. 331,955, filed August 25, 1906, entitled Hoister with loose reversible drum, the improvement in the present case consisting of the mounting of the parts upon a hollow stationary shaft in the manner I have set forth. 7

Having thus set forth the nature of the invention, what is claimed herein is 1. In a hoisting-engine, the combination, with a hollow drum-shaft and a frictionvdriver fitted to turn thereon and supported against end movement, with means for rotatin the same continuously upon the shaft, of a rum fitted to turn upon the shaft and having a friction-surface to engage the frictiondrlver, a nut screwed inside the end of the shaft, a thrust-screw extended through the ITO said nut, and connections fromsaid screw for pressing the drum toward the friction-driver to con e them together.

2. n a hoisting-engine, the combination, 11

with a hollow drum-shaft held stationary in bearings, of a driving-gear and reversinggear fitted to turn near the op osite ends of the shaft and held from on movements thereon, a drum fitted to turn upon the shaft between the said gears, complementary friction-surfaces upon the opposite ends of the drum and adjacent gears, and means operated through the interior of the shaft for pressing the drum toward either of the gears, 1 2

to rotate it at pleasure in op osite directions. 3. In ahoisting-engine, t-e combination,

with a hollow drum-shaft and a drivingegear fitted to turn thereon and supported against end movement, of a drum fitted to turn upon 0 the shaft, complementary friction-surfaces upon the gear and drum, a nut screwed inside the end of the shaft, a thrust-screw ex? tended through the said nut, and connection from said screw for pressing the drum toward the driving-gear to couple them together.

4. In a hoisting-engine, the combination, with a hollow shaft and bearings for holdin the same stationary, of a driving-gear and reversing-gear fitted each to turn upon the shaft near one end of the same, a drum fitted to turn upon the shaft between the said clear all the friction-surfaces.

5. In a hoisti -engine, the combination, with a hollow sha t and bearings for holding the same stationary, of a driving-gear an reversing-gear fitted each to turn upon the .shaft near one end of the same, a drum fitted to turn upon the shaft between the said gears, complementary friction surfaoes upon the ends of the drum and adjacent gears, nuts screwed in the ends of the shaft, thrutscrews extended through the nuts with con- Qnections from of the drum for the same to the opposite ends ptessing it in opposite directions, a gear-sha extended at t side of the plyin oil to the interior 0 drum with gearing coupling the ends of the shaft to both of the said thrust-screws, and means for rotating the gearing to turn the thrust-screws. Y

6. In 'a hoistin -engine, the combination, with a hollow sha t and bearings for holding the same stationary, of a drum and gear fitted each with hub to turn upon the shaft, complementary friction-surfaces upon the drum and gear, means operating through the interior of the shaft for pressing the drum and gear together to couple them when desired, an oil-hole extending from the interior of the shaft to the hub of the drum, and means for supplying oil to the interior "of the shaft to lubricate the said hub.

7. In a hoisting-engine, the combination,

with a hollow shaft having a drum fitted to I the shaft having slots rotate upon the same,

the ends of the drum.

0 with cross-keys a at of the plug e fitted tightly adjacent to such cross-ke s, means for su'pthe shaft between the'p ugs, and the shaft having oil-holes f withm the hubs of the drum for supplying oil to the same.

In testimony whereof myhand in the presence of witnesses.

' ASHER LAMBERT.

I have hereunto set Witnesses: I

J. G. DELANEY, M. G. BENFER.

within the shaft two subscribing 

